Wednesday, February 24, 2016

JGroups 3.6.8 released

FYI, 3.6.8.Final has been released.

Not a big release; it contains mostly optimizations and a nice probe improvement. The main issues are listed below.
Enjoy!

Bela

New features
============
Probe improvements
------------------
[https://issues.jboss.org/browse/JGRP-2004]
[https://issues.jboss.org/browse/JGRP-2005]
- Proper discarding of messages from a different cluster with '-cluster' option.
- Less information per cluster member; only the requested information is returned
- Detailed information about RPCs (number of sync, async RPCs, plus timings)
- http://www.jgroups.org/manual/index.html#_looking_at_details_of_rpcs_with_probe
Optimizations
=============
DONT_BUNDLE and OOB: messages are not removed from batch when execution fails
-----------------------------------------------------------------------------
[https://issues.jboss.org/browse/JGRP-2015]
- Messages are not removed from batch when execution fails
- Rejections are not counted to num_rejected_msgs
COMPRESS: removed 1 byte[] buff copy
------------------------------------
[https://issues.jboss.org/browse/JGRP-2017]
An unneeded copy of the compressed payload was created when sending and compressing a message. The fix should reduce
memory allocation pressure quite a bit.
RpcDispatcher: don't copy the first anycast
-------------------------------------------
[https://issues.jboss.org/browse/JGRP-2010]
When sending an anycast to 3 destinations, JGroups sends a copy of the original message to all 3. However, the first
doesn't need to be copied (less memory allocation pressure). For an anycast to a single destination, no copy is
needed, either.
Compaction of in-memory size
----------------------------
[https://issues.jboss.org/browse/JGRP-2011]
[https://issues.jboss.org/browse/JGRP-2012]
- Reduced size of Rsp (used in every RPC) from 32 -> 24 bytes
- Request/UnicastRequest/GroupRequest: reduced size
RequestCorrelator.done() is slow
--------------------------------
[https://issues.jboss.org/browse/JGRP-2013]
Used by RpcDispatcher. Fixed by eliminating the linear search done previously.
Bug fixes
=========
FILE_PING: consider special characters in file names
----------------------------------------------------
[https://issues.jboss.org/browse/JGRP-2014]
Names like "A/web-cluster" would fail on Windows as the slash char ('/') was treated as demarcation char in some clouds.
Manual
======
The manual is at http://www.jgroups.org/manual/index.html.
The complete list of features and bug fixes can be found at http://jira.jboss.com/jira/browse/JGRP.
Bela Ban, Kreuzlingen, Switzerland
Feb 2016